Malicious PDF — malware analysis report

Static analysis result for SHA-256 2942f3a9fc6e8400…

MALICIOUS

PDF

51.8 KB Created: 2020-08-12 08:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e28a1634a07615d43e88931f8db21b SHA-1: 027919b60c61e9e4eb886be00e47f93c3df94d10 SHA-256: 2942f3a9fc6e8400c8bf56e73d7be87d860f04c0323d9406a0da4bd6fbfc20ae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though malformed, contains text related to a 'Nobel Prize book PDF' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=abhijit+banerjee+nobel+prize+book+pdf
    • http://penikap.mividalocagallery.com/uploads/1/3/0/8/130814328/kilobukiwasaxub_simigu_jagawogaveser.pdf
    • http://files.expertpromotions.org/uploads/1/3/1/4/131406749/namevuzeduliz_xenowogulijovop_gaxupeb_fedoterozado.pdf
    • http://files.shorttermmission.org/uploads/1/3/0/8/130874025/3125667.pdf
    • http://nesogozu.funkyjunknl.ca/uploads/1/3/2/6/132696414/vixupulewubevew.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/22320873924.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/70957885829.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/519692178.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/judaroxafobuseluwusar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/signos_y_sintomas_del_cancer_de_cuello_uterino.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/6540572539.pdf
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/oblivion_multiplayer_mod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/demiridaposor.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/354766333.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/astrology_a_guide_to_understanding_your_birth_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/bufajodogarovepo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a7.bin
8acf5767834169087a4c8dc1015c293bfe1852225c02fe8ba883678a8449c259		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A7 5268 bytes
font_01_sfnt_off0000887e.bin
d403a7ce423bcaaf83afcd4cfb730b49a6304fe5dc76b820cfb698bbd55e8874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887E 5676 bytes
font_02_sfnt_off00009b41.bin
1fad56b98c9a34d26a190f4340757b1be8ddb9c260d884a0a5798233bdfa2ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B41 10788 bytes

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